Hello, thanks for replying. Well, since you're the only person that showed interest in this, that would probably make you the level designer? I know you said you're a programmer, but I would be using Flare Engine for the game mechanics, and I would probably buy some pixel art from penusbmic from his dark series (here on itch.io) to use for the game. The game jam I had in mind was this one: https://itch.io/jam/metroidvania-month-super-25
Let me know your thoughts. I'm always working on side projects, so don't feel like you have to do this if this is not what you are looking for. Kind regards.